The Good: Handles like a scalpel. Cheap PC Works pipe and shorty will restore explosive 05/06 powerband(at a small over-rev cost) that 07 re-porting tamed. Cheap to buy, cheap to fix. Developing Popeye forearms to hold on when it hooks up.
The Bad: If you've only ridden 4Ts, expect a learning curve. This isn't some 4T tractor with lbs of gyroscopic rotating mass right under your balls resisting leaning. If you've only ridden 4Ts, you will overshoot some corners and stall the engine while you learn how to use brakes with no engine braking to help. Sprained cheek muscles from all the grinning.